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Transient power quality detection device and method for the same

A technology of transient power quality and detection devices, which is applied in the field of power transmission and distribution, and can solve problems such as few and difficult devices to implement

Inactive Publication Date: 2012-05-09
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are not many domestic achievements in the development of transient power quality detection devices. The main reason is that some current transient power quality detection methods are difficult to implement on devices.

Method used

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  • Transient power quality detection device and method for the same
  • Transient power quality detection device and method for the same

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Embodiment Construction

[0076] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0077] figure 1 It is a structural block diagram of the present invention. In this embodiment, the model of the transformer is TV1013-1, the model of the phase-locked loop chip is 74HC4046, the model of the serial frequency divider is CD4040, and the model of the two A / D converters is ADS5422, the model of the two DSP controllers is TMS320C6203B, the model of the one-chip computer is 80c196, the model of the cache is IDT72V2113, and the model of the USB controller is CY7C68013.

[0078] This embodiment adopts a structure in which two sets of DSP controllers are connected to a single-chip microcomputer, and takes the connection of a set of DSP controllers as an example to illustrate its circuit connection relationship.

[0079] The power grid signal obtained from the transformer is double-input to the A / D converter, and one is used as the inpu...

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Abstract

The invention discloses a transient power quality detection device and a method for the same, belonging to the technical field of power transmission and distribution. The method comprises the following steps of: acquiring an undisturbed standard signal, processing the undisturbed standard signal with an improved S transformation method to get a base matrix of the undisturbed standard signal; acquiring voltage sag, voltage swell, voltage interruption, high-frequency transient disturbing signals and low-frequency disturbing signals, scaling a curve chart of the signals after being processed by the improved S transformation, building a standard template, and storing the template in a database; acquiring three-phase voltage and three-phase current data in a power grid; and matching the digital image curve with the standard template in the database according to a digital image matching principle so as to get the disturbance patterns. The invention provides the transient power quality detection device and the method for the same based on the improved S method, optimal design is provided in the aspects of detection accuracy, function implementation, data storage and the like of the device, so that real-time analytical ability and remote communication capability of transient power quality detection are improved.

Description

technical field [0001] The invention belongs to the technical field of power transmission and distribution, and in particular relates to a transient power quality detection device and method. Background technique [0002] In today's society, electric energy, as a clean, economical and controllable energy, has been widely used in all levels of the national economy. With the development of science and technology, the society has higher and higher requirements for power quality. Research and improvement of power quality is of great importance to the safe and economical operation of power grids and electrical equipment, the guarantee of product quality, scientific experiments, and the normal life and production of people. have important meaning. [0003] Power quality problems are divided into steady state power quality problems and transient power quality problems. Domestic research on steady-state power quality has been conducted for a long time, and there are many achieveme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 张化光姜斌李典阳孙秋野冯健杨珺陆宁云王占山
Owner NORTHEASTERN UNIV
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